Chapter 22. Flashcards
Active tooth eruption
Emergence of crown into oral cavity.
Refers to the total lifespan of the tooth. — from beginning of crown development until tooth is lost or individual dies.
Three stages of tooth eruption
Pre-eruption stage
Eruptive stage
Post-eruptive stage
Pre-eruptive stage begins
As the crown starts to develop
Movement in the pre-eruptive stage is of 2 varieties. What are they?
Spatial and eccentric
Spatial movement
The crown develops while the bottom of the socket fills with bone, pushing the crown toward the surface.
Eccentric movement
The crown of the tooth does not grow in a perfectly symmetrical pattern. The center of the tooth is shifting.
Excentric movement is also called
Off center growth
Eruptive stage also known as
Pre-functional eruptive stage
Eruptive stage begins
With the development of the root
During eruptive stage
The tooth breaks through the mucosal layer and emerges into the oral cavity.
Eruptive stage continues until
Erupting teeth meet opposing teeth.
Eruptive stage is
Occlusal and facial. More facial in the anterior than the posteriors
Post-eruptive stage begins
When the teeth come into occlusion and continues until they are lost or death occurs
Post-eruptive stage functions
In several ways
During post-eruptive stage first
The mandible continues to grow and increase the space between maxilla and mandible. The teeth continue to erupt to maintain a balance in the arches
During post-eruptive stage second
The teeth wear occlusally because of prolonged masticating stress and wear. They will continue to erupt to maintain tooth contact
During post-eruptive stage third
Because there is slight interpersonal wear, there will be a slight medial eruptive Force that keeps the teeth in contact
Finally during post-eruptive stage
If an opposing tooth is lost the tooth may continue to erupt in what is generally referred to as supraeruption which can cause serious problems in the replacement of the missing tooth because it makes it difficult to establish a normal occlusal plane
Causes of tooth eruption
Root elongation
Alveolar bone formation and changes
Vascular pressure in dental tissues
The role of the tooth itself
Root elongation
Increase in root length or root elongation forces the tooth into the oral cavity
Alveolar bone formation and changes
Alveolar home growth, tooth development, and eruption are interdependent mechanisms
Vascular pressure in dental tissues
Vascular pressures present enhance cellular activity but seem to have a direct eruptive role
The role of the tooth itself
Plays little if any role in eruption because developing teeth have been surgically removed and replaced by metal or silicone implants into the dental sac and these implants have erupted
Tooth eruption is definitely
Multifactorial
